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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
O₂ content in atmospheric air on weight basis is

0.4
0.21
0.3
0.23

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Steam Boilers, Engines, Nozzles and Turbines
Thermal equilibrium means that the flow of steam is

Isentropic
Hyperbolic
Isothermal
Polytropic

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Steam Boilers, Engines, Nozzles and Turbines
In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts. and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is

0.4
0.5
0.8
0.25

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Steam Boilers, Engines, Nozzles and Turbines
In a nozzle, the effect of super-saturation is to

Decrease dryness fraction of steam
Decrease specific volume of steam
Increase the heat drop
Increase the entropy

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Steam Boilers, Engines, Nozzles and Turbines
The purpose of governing in steam turbines is to

Reduce the effective heat drop
Completely balance against end thrust
Reheat the steam and improve its quality
Maintain the speed of the turbine

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Steam Boilers, Engines, Nozzles and Turbines
The maximum discharge through a chimney occurs when the height of chimney is

Outside temperature is very low
Equal to the height of the hot gas column producing draught
Around 200 meters
Infinitely long

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